On this page, we will review the Analog Electronics Short Notes PDF Part 14. Welcome to Poly Notes Hub, a leading destination for analog electronics notes for engineering students.
Author Name: Arun Paul
Analog Electronics Short Notes Pdf Part 14
Here we have listed some analog electronics short notes for all types of exams like diploma engineering, degree engineering, and GATE exam and many more. In every page, we have listed 10 short analog electronics questions and answers and anyone can download it by a single click for future use.
1. What is Feedback Circuit?
A feedback circuit is a system where a portion of the output signal is fed back to the input to control the gain or stability of the amplifier. It can be positive or negative.
2. What is Positive Feedback?
Positive feedback occurs when the feedback signal is in phase with the input, thereby increasing the input signal and resulting in higher gain. It is often used in oscillators.
3. What is Negative Feedback?
Negative feedback happens when the feedback signal is out of phase with the input, which reduces the gain but improves stability, bandwidth, and linearity of the amplifier.
4. What is the Use of Positive Feedback?
Positive feedback is mainly used in oscillator circuits where continuous wave generation is needed. It helps in sustaining undamped oscillations at a desired frequency.
5. What is the Use of Negative Feedback?
Negative feedback is widely used in amplifiers to improve stability, reduce distortion, increase bandwidth, and control gain precisely.
6. What is Emitter Follower Circuit?
An Emitter Follower is a transistor circuit where the output is taken from the emitter. It provides high input impedance and low output impedance, acting as a buffer.
7. What is the Operation of Emitter Follower Circuit?
In an emitter follower, the input signal is applied to the base and the output is taken from the emitter. The output voltage follows the input, hence the name.
8. What are the Applications of Emitter Follower Circuit?
Emitter followers are used for impedance matching, buffer stages, and as voltage followers in amplifier circuits due to their unity gain and excellent signal coupling.
9. What is Darlington Amplifier?
A Darlington amplifier consists of two transistors connected together so that the current amplified by the first is further amplified by the second, offering very high current gain.
10. What are the Characteristics of Darlington Amplifier?
A Darlington amplifier has high input impedance, very high current gain, low output impedance, and is ideal for switching and amplification of weak signals.